Ramsey Electronics FM30, Руководство пользователя

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FM30
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105. You’ll see a place on the board for R11. Install no part in this posi-
tion.
106. Install R5, 100uF electrolytic cap. Yes, it’s a little unconventional but
it was a late parts change and we knew you could handle it. The shorter
negative lead is placed in the hole facing Q4. Get it in place as well as you
can and solder it in.
107. Install C12, 10nF or 0.01uF ceramic disc capacitor (marked 103).
108. Install C15, 10uF electrolytic. This one’s a little weird because the “+”
sign is inside the “C” of the silkscreen, but it’s there so follow it for orienta-
tion.
109. Install R29, 33k ohms (orange-orange-orange).
110. Install C34, 47nF or 0.047uF ceramic disc capacitor (marked 473).
111. Install R23, 47k ohms, (yellow-violet-orange).
112. Install R20, 180 ohms (brown-grey-brown).
113. Install R21, 3.3k ohm resistor (orange-orange-red).
114. Install C33, 1nF or 0.001uF ceramic disc capacitor (marked 102).
115. Install Q3, 2N3904 NPN transistor. Follow the flat side on the part
and the Layout Diagram for correct placement.
116. Next install Q2, another 2N3904 NPN transistor. Again, orient the
part using the flat side of the transistor.
117. Install R17, 4.7k ohms (yellow-violet-red).
118. Install C24, 0.1uF ceramic disc capacitor (marked 104).
119. Install C38, 100uF electrolytic capacitor. Just as you did with all the
others, follow the “+” sign on the board so you’ll know how to install this
part.
Now we’ll place some of the larger parts, the jacks and switches, then we’ll
move on to the smaller front panel PC board.
120. Since we’re in the area, install S1, the DPDT power switch. Make
sure it is seated flat on the PC board before soldering.
121. Moving on to the back of the board, install J3, the 2.1mm center post
positive power jack. Again, be sure the part is flat before soldering.
122. Install J10, one of the RCA jacks.